130 lines
3.0 KiB
C#
130 lines
3.0 KiB
C#
//
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// System.Diagnostics.Stopwatch.cs
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//
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// Authors:
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// Zoltan Varga (vargaz@gmail.com)
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// Atsushi Enomoto <atsushi@ximian.com>
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//
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// (C) 2006 Novell, Inc.
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//
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.ComponentModel;
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using System.Runtime.InteropServices;
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using System.Runtime.CompilerServices;
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namespace System.Diagnostics
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{
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public class Stopwatch
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{
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[MethodImplAttribute(MethodImplOptions.InternalCall)]
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public static extern long GetTimestamp ();
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public static readonly long Frequency = 10000000;
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public static readonly bool IsHighResolution = true;
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public static Stopwatch StartNew ()
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{
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Stopwatch s = new Stopwatch ();
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s.Start ();
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return s;
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}
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public Stopwatch ()
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{
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}
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long elapsed;
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long started;
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bool is_running;
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public TimeSpan Elapsed {
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get {
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if (IsHighResolution) {
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// convert our ticks to TimeSpace ticks, 100 nano second units
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// using two divisions helps avoid overflow
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return TimeSpan.FromTicks ((long)(ElapsedTicks / (Frequency / TimeSpan.TicksPerSecond)));
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}
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else {
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return TimeSpan.FromTicks (ElapsedTicks);
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}
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}
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}
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public long ElapsedMilliseconds {
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get {
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checked {
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if (IsHighResolution) {
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return (long)(ElapsedTicks / (Frequency / 1000));
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}
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else {
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return (long) Elapsed.TotalMilliseconds;
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}
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}
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}
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}
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public long ElapsedTicks {
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get { return is_running ? GetTimestamp () - started + elapsed : elapsed; }
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}
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public bool IsRunning {
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get { return is_running; }
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}
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public void Reset ()
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{
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elapsed = 0;
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is_running = false;
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}
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public void Start ()
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{
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if (is_running)
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return;
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started = GetTimestamp ();
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is_running = true;
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}
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public void Stop ()
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{
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if (!is_running)
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return;
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elapsed += GetTimestamp () - started;
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if (elapsed < 0)
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elapsed = 0;
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is_running = false;
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}
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public void Restart ()
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{
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started = GetTimestamp ();
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elapsed = 0;
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is_running = true;
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}
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}
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}
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